/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.evaluation.value;

import proguard.classfile.*;
import proguard.classfile.util.ClassUtil;

/**
 * This class provides methods to create and reuse Value objects. Its ReferenceValue objects have types if they
 * represent primitive arrays.
 *
 * @author Eric Lafortune
 */
public class PrimitiveTypedReferenceValueFactory extends BasicValueFactory {
    static final ReferenceValue REFERENCE_VALUE_NULL = new TypedReferenceValue(null, null, false, true);

    // Implementations for BasicValueFactory.

    public ReferenceValue createReferenceValueNull() {
        return REFERENCE_VALUE_NULL;
    }

    public ReferenceValue createReferenceValue(String type, Clazz referencedClass, boolean mayBeExtension,
        boolean mayBeNull) {
        return type == null ? REFERENCE_VALUE_NULL
            : !ClassUtil.isInternalArrayType(type) || ClassUtil.isInternalClassType(type) ? REFERENCE_VALUE
                : new TypedReferenceValue(type, referencedClass, mayBeExtension, mayBeNull);
    }

    public ReferenceValue createArrayReferenceValue(String type, Clazz referencedClass, IntegerValue arrayLength) {
        return type == null ? REFERENCE_VALUE_NULL
            : new ArrayReferenceValue(ClassConstants.TYPE_ARRAY + type, referencedClass, false, arrayLength);
    }

}